﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Hack.Pdb2Mdb
{
    public class PdbConstant
    {
        public string name;
        public uint token;
        public object value;

        public PdbConstant(BitAccess bits)
        {
            bits.ReadUInt32(out this.token);
            byte tag1;
            bits.ReadUInt8(out tag1);
            byte tag2;
            bits.ReadUInt8(out tag2);
            if (tag2 == 0)
            {
                this.value = tag1;
            }
            else if (tag2 == 0x80)
            {
                switch (tag1)
                {
                    case 0x01: //short
                        short s;
                        bits.ReadInt16(out s);
                        this.value = s;
                        break;
                    case 0x02: //ushort
                        ushort us;
                        bits.ReadUInt16(out us);
                        this.value = us;
                        break;
                    case 0x03: //int
                        int i;
                        bits.ReadInt32(out i);
                        this.value = i;
                        break;
                    case 0x04: //uint
                        uint ui;
                        bits.ReadUInt32(out ui);
                        this.value = ui;
                        break;
                    case 0x05: //float
                        this.value = bits.ReadFloat();
                        break;
                    case 0x06: //double
                        this.value = bits.ReadDouble();
                        break;
                    case 0x09: //long
                        long sl;
                        bits.ReadInt64(out sl);
                        this.value = sl;
                        break;
                    case 0x0a: //ulong
                        ulong ul;
                        bits.ReadUInt64(out ul);
                        this.value = ul;
                        break;
                    case 0x10: //string
                        string str;
                        bits.ReadBString(out str);
                        this.value = str;
                        break;
                    case 0x19: //decimal
                        this.value = bits.ReadDecimal();
                        break;
                    default:
                        //TODO: error
                        break;
                }
            }
            else
            {
                //TODO: error
            }
            bits.ReadCString(out name);
        }
    }
}
